Composable command line interface toolkit
** NOTE ** This is an un-official preview version of click v8.0.
Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as necessary. It’s the “Command Line Interface Creation Kit”. It’s highly configurable but comes with sensible defaults out of the box.
It aims to make the process of writing command line tools quick and fun while also preventing any frustration caused by the inability to implement an intended CLI API.
Click in three points:
- Arbitrary nesting of commands
- Automatic help page generation
- Supports lazy loading of subcommands at runtime
Install and update using pip:
$ pip install click
Click supports Python 3.4 and newer, Python 2.7, and PyPy.
A Simple Example
What does it look like? Here is an example of a simple Click program:
import click @click.command() @click.option("--count", default=1, help="Number of greetings.") @click.option("--name", prompt="Your name", help="The person to greet.") def hello(count, name): """Simple program that greets NAME for a total of COUNT times.""" for _ in range(count): click.echo("Hello, %s!" % name) if __name__ == '__main__': hello()
And what it looks like when run:
$ python hello.py --count=3 Your name: Click Hello, Click! Hello, Click! Hello, Click!
The Pallets organization develops and supports Click and other popular packages. In order to grow the community of contributors and users, and allow the maintainers to devote more time to the projects, please donate today.
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